The pair will come with 2 batteries (1 for each hoop) and one charger. As with all of our LED hoops they come with velcro straps to collapse, and with a warranty on any electrical issue. Water damage is not covered, but i’ve used mine in rain several times so they are quite safe in some rain. You don’t want to store in wet/moist places or submerge in water. Tubing condition is not covered, but if you break/kink your tubing we we gladly re-tube for you for 20 dollars plus return shipping. This is pretty rare in general, but if you are concerned than HDPE is the better tubing choice for durability…it is extremely durable!